Apr 28, 2009

The aral sea

The Aral Sea is a landlocked endorheic basin in central asia. It located near Kazakhstan in the north and Uzbekistan in the south.

There are now three lakes in the Aral Basin: the north Aral sea and the eastern and western basins of the south Aral sea.
The problem of the sea of Aral Sea is the misappropriation of the 2 rivers which feed it. This is Russian which diverted these rivers to irrigate cotton fields. By 1960, between 20 and 60 cubic kilometers of water were going each year to the land instead of the sea.

Because of this or that the feeding of the sea in stopped causing the disappeared of this one. The sea had shrunk to 25% of its original surface area. The fall of the quantity of water in the sea in entrained a number mattering from problems.
The first is a visible symptom, the villages of fishers meets far from the coast consequently.
The second problem is an increase of the saltiness drawing away the death of numerous species of fish; nearly fivefold increase in salinity had killed most of its natural flora and fauna.
For economic reasons, have can see how people are able to putting in difficult the populations and destroying an old ecosystem of thousand years.

Possible solutions:
Many different solutions to the different problems have been suggested over the years, ranging in feasibility and cost, including the following:

  • Improving the quality of irrigation canals;

  • Installing desalination plants;

  • Charging farmers to use the water from the rivers;

  • Using alternative cotton species that require less water;

  • Using fewer chemicals on the cotton;

  • Installing dams to fill the Aral Sea;

  • Redirecting water from the Volga, Ob and Irtysh rivers. This would restore the Aral Sea to its former size in 20–30 years at a cost of US$30–50 billion;

  • Pump and dilute sea water into the Aral Sea from the Caspian sea via pipeline.